
<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8" />
    <link rel="stylesheet" href="./cesium/Cesium1.98/Widgets/widgets.css">
    <script type="text/javascript" src="./cesium/Cesium1.98/Cesium.js"></script>

</head>

<body style="margin: 0; overflow: hidden; background: #fff; width: 100%; height: 100%; position: absolute; top: 0">
    <div id="map" style="margin: 0 auto; width: 100%; height: 100%"></div>
    <script type="text/javascript">

        Cesium.Ion.defaultAccessToken = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiI3ZjQ5ZGUzNC1jNWYwLTQ1ZTMtYmNjYS05YTY4ZTVmN2I2MDkiLCJpZCI6MTE3MTM4LCJpYXQiOjE2NzY0NDUyODB9.ZaNSBIfc1sGLhQd_xqhiSsc0yr8oS0wt1hAo9gbke6M'
        const viewer = new Cesium.Viewer('map', {});

        // 开启帧率
        viewer.scene.debugShowFramesPerSecond = true;

        // add、remove、removeById、removeAll

        var hello = viewer.entities.add({
            name: '贴地',
            id: 'test',
            position: Cesium.Cartesian3.fromDegrees(-75, 39),
            label: {
                text: '贴地',
                font: '14pt monospace',
                outlineWidth: 2,
                verticalOrigin: Cesium.VerticalOrigin.TOP,
                heightReference: Cesium.HeightReference.CLAMP_TO_GROUND,
                disableDepthTestDistance: Number.POSITIVE_INFINITY,
                showBackground: true,
                backgroundColor: Cesium.Color.WHITE,
                fillColor: Cesium.Color.RED
            }
        });

        var entity1 = viewer.entities.getById('test');

        // viewer.entities.remove(hello); //通过对象删除
        // viewer.entities.remove(entity1);   //通过id删除
        // viewer.entities.removeById("test"); //通过id删除
        // viewer.entities.removeAll();   //删除所有

    </script>
</body>

</html>